・According to this book by repeated the same thing, neural circuitry of the brain
will be strengthened.
・And these "negative" things are firmly memorized by the neural circuit, and a "positive" things are hard to be memorized.
・In modern society with much stress that is going to simple society from growth society, if nothing is done, a "negative" neural circuit will be strengthened in a brain and a "positive" neural circuit will become overwhelmingly inferior in strength.
・Then, it is necessary to train being conscious of a "positive" neural circuit.